I interviewed at Onyx Capital Group (London, England)
Interview
First stage was a very long assessment center, which was odd. Got a take-home task the previous day, which I personally found quite tough and spent the whole day working on. Most candidates just sent the whole thing through Claude and finished it super quickly.
The AC itself consisted of an AI-less coding task with Pandas and Python, fairly straightforward but some people struggled with it and one guy even left. Then, we presented our take-home tasks to everyone. Afterwards, we got lunch, had a group activity, and 1-1 interviews.
Overall, team was pretty nice and chill. Just a bit of a slog and I guess they're very busy as they would frequently come in/out during the interviews. Fair enough, though.
Interview questions [1]
Question 1
They'll dive into your approach for the take-home, so make sure that if you did use AI, you know what exactly is happening and why. Also be ready for the standard interview questions like 'why this role', etc...
"Pre-assessment centre where your CV is grilled and you do a few typical trading exercises. Do well enough to get to the assessment centre from 8am-6pm, more interviews and computation and trading games. Overall very unprofessional and arbitrary. Onyx traders regularly swore and yelled at candidates. when one candidate started playing a trading game prematurely, one of the traders yelled 'we haven't started yet' one of the games was a literal tiktok trend where you have to say the word to the beat. Despite their claims of meritocracy our AC ended with the worst performing candidate by a significant margin on all objective assessments continuing whilst all but one of the better performing men left. they also refused to accept any reasonable adjustments."
CV and screening call followed by an in-person assessment day, consisting of several interviews with an emphasis on interest for the role, mental maths and raw intellectual ability (tests like concentration grids).